- Race: Rat
- Type: Unit
- Tech requirements: none
- Built where?: Nest
- Build cost / time: 2 water / 1 turn
To bring a Male Rat into play, pay the cost (2 water), place the card face down underneath a ready Nest, and engage both cards 1 turn.
Against the Virus, Male Rats are generally favored over Female Rats during the early game since they can survive Infection I. However, after the Virus researches Infection II, both male and female carriers can be killed by infection. As such, Female Rats are more important in the late game.